Add PF0 / PF1 pins on STM32F030F4

Author: urish

variants/DEMO_F030F4/variant.cpp

@@ -54,6 +54,9 @@ const PinName digitalPin[] = {
   PA_10, //D10 - SDA (RX UART Header)
   PA_13, //D11 - SWDIO
   PA_14, //D12 - SWCLK
+  // These two are only available on boards without a crystal:
+  PF_0,
+  PF_1,
   // Duplicated pins in order to be aligned with PinMap_ADC
   // A0 have to be greater than NUM_ANALOG_INPUTS
   PA_0,  //D13/A0 ~ D0

variants/DEMO_F030F4/variant.h

@@ -54,12 +54,15 @@ extern "C" {
 #define PA10 10 //D10   - SDA (RX UART header)
 #define PA13 11 //D11   - SWDIO
 #define PA14 12 //D12   - SWCLK
+// Boards without a crystal can use these pins as well:
+#define PF0  13
+#define PF1  14
 
 // This must be a literal with the same value as PEND
-#define NUM_DIGITAL_PINS        22
+#define NUM_DIGITAL_PINS        24
 // This must be a literal with a value less than or equal to MAX_ANALOG_INPUTS
 #define NUM_ANALOG_INPUTS       9
-#define NUM_ANALOG_FIRST        13
+#define NUM_ANALOG_FIRST        15
 
 // On-board LED pin number
 #define LED_BUILTIN             PA4